Use the DtInitialize() function to initialize the Desktop Services Library.
DtInitialize(*display,widget,*name,*tool_class)
DtInitialize() uses the default Intrinsic XtAppContext. The API provides an additional function, DtAppInitialize() to use when your application must specify an app_context:
DtAppInitialize(app_context,*display,widget,*name, tool_class)
The following code segment shows how the example program actions.c uses DtInitialize().